CPM-GOMS
Encyclopedia
CPM-GOMS is a variation of the GOMS
technique in human computer interaction. CPM-GOMS stands for two things: Cognitive Perceptual Motor and the project planning technique Critical Path Method
(from which it borrows some elements).
, a former student of Allen Newell
. Unlike the other GOMS variations, CPM-GOMS does not assume that the user's interaction is a serial process, and hence can model multitasking behavior that can be exhibited by experienced users. The technique is also based directly on the model human processor - a simplified model of human responses.
Evaluators begin a CPM-GOMS analysis in the same way they would a CMN-GOMS
analysis. However, when the tasks are broken down just to the level where they are still perceptual or motor, the evaluator applies techniques from the model human processor. The tasks are first joined together serially and then examined to see which actions can be overlapped so that they happen in parallel. This technique facilitates representation of overlapping and very efficient "chunks" of activity characteristic of expert users. The estimated times by CPM-GOMS are generally faster since they do not allocate as much time to the "prepare for action" type operations.
This is the most difficult GOMS technique to implement. Therefore it has the problem of discrepancies between evaluators. Research is currently being conducted to improve the CPM-GOMS technique so that it can be used without the evaluator having a high level understanding of the GOMS theoretical foundations.
GOMS
GOMS is a kind of specialized human information processor model for human computer interaction observation. Developed in 1983 by Stuart Card, Thomas P. Moran and Allen Newell, it was explained in their book The Psychology of Human Computer Interaction...
technique in human computer interaction. CPM-GOMS stands for two things: Cognitive Perceptual Motor and the project planning technique Critical Path Method
Critical path method
The critical path method is an algorithm for scheduling a set of project activities. It is an important tool for effective project management.-History:...
(from which it borrows some elements).
Overview
CPM-GOMS was developed in 1988 by Bonnie JohnBonnie E. John
Bonnie E. John is an American cognitive psychologist who studies human-computer interaction, predictive human performance modeling, and the relationship between usability and software architecture...
, a former student of Allen Newell
Allen Newell
Allen Newell was a researcher in computer science and cognitive psychology at the RAND corporation and at Carnegie Mellon University’s School of Computer Science, Tepper School of Business, and Department of Psychology...
. Unlike the other GOMS variations, CPM-GOMS does not assume that the user's interaction is a serial process, and hence can model multitasking behavior that can be exhibited by experienced users. The technique is also based directly on the model human processor - a simplified model of human responses.
Evaluators begin a CPM-GOMS analysis in the same way they would a CMN-GOMS
CMN-GOMS
CMN-GOMS stands for Card, Moran and Newell GOMS. CMN-GOMS is the original version of the GOMS technique in human computer interaction. It takes the name after its creators Stuart Card, Thomas P...
analysis. However, when the tasks are broken down just to the level where they are still perceptual or motor, the evaluator applies techniques from the model human processor. The tasks are first joined together serially and then examined to see which actions can be overlapped so that they happen in parallel. This technique facilitates representation of overlapping and very efficient "chunks" of activity characteristic of expert users. The estimated times by CPM-GOMS are generally faster since they do not allocate as much time to the "prepare for action" type operations.
This is the most difficult GOMS technique to implement. Therefore it has the problem of discrepancies between evaluators. Research is currently being conducted to improve the CPM-GOMS technique so that it can be used without the evaluator having a high level understanding of the GOMS theoretical foundations.
Notations
- This article incorporates text from Dr. G. Abowd: GOMS Analysis Techniques - Final Essay, which has been released into GFDL by its author (see http://en.wikipedia.org/w/index.php?title=Talk:GOMS&oldid=19999716).